ADR4533ARZ

Overview

The ADR4533ARZ is a high-precision, low-power voltage reference from Analog Devices featuring an output voltage of 3.300 V and B grade initial accuracy of ±0.02%. It operates within an input voltage range of 3.4 V to 15 V and delivers up to 10 mA sourcing current with a maximum quiescent current of 950 μA. The device exhibits a temperature coefficient of 2 ppm/°C over the −40°C to +125°C range and maintains low output noise of 2.1 μV p-p (0.1 Hz to 10 Hz). Packaged in an 8-lead SOIC, it supports industrial instrumentation and precision measurement applications.

Feature Summary

• Ultra-low noise performance for sensitive signal chains
• High accuracy with minimal initial error and thermal drift
• Low dropout capability for portable equipment efficiency
• Robust long-term stability and low hysteresis

Applications

• Precision data acquisition systems
• High resolution data converters
• Industrial instrumentation
• Medical devices

Procurement Notes

Verify the specific grade (B or A) required for your application's accuracy needs, as the datasheet specifies distinct temperature coefficients and initial errors for each. Confirm that the 8-lead SOIC package aligns with your PCB layout constraints. Ensure input voltage stays within the 3.4 V to 15 V operational window to maintain specified line regulation and ripple rejection ratios during system integration.

Selection Notes

Select this component when ultralow noise and high precision are critical for maintaining system integrity in analog front ends. The 3.3 V output eliminates the need for external scaling in many microcontroller interfaces. Consider the 950 μA maximum quiescent current for battery-powered designs where power conservation is essential alongside measurement accuracy requirements.

Part Context

This part belongs to the ADR45xx series of ultralow noise, high accuracy voltage references. The family includes variants with outputs ranging from 2.048 V to 5.0 V, all sharing similar core topologies for excellent temperature stability. The ADR4533 specifically targets applications requiring a standard 3.3 V reference with stringent noise and drift specifications.

Replacement Considerations

Direct pin-compatible replacements within the same family include the ADR4530 (3.0 V) and ADR4540 (4.096 V), though output voltages differ. Cross-family alternatives like the ADR42x series offer different noise profiles but require circuit adjustments.